Clinical Optics and Refraction: A Guide for Optometrists, Contact Lens Opticians and Dispensing OpticiansAndrew Keirl, Caroline Christie It provides a comprehensive and clinically based guide to visual optics. With its suggested routines and numerous examples, this new book offers a straightforward "how to approach" to the understanding of clinical optics, refraction and contact lens optics. Designed for easy access, it presents information in a concise format that highlights key, need-to-know points. Part 1 addresses the basic visual optics of the eye along with emmetropia, ametropia and the correction of ametropia with spectacle lenses. Part 2 turns to the optics of contact lenses and the use of contact lenses in vision correction.
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Contents
Chapter | 2 |
Schematic Eyes Emmetropia | 20 |
The Correction of Spherical Ametropia | 31 |
The Basic Retinal Image | 43 |
Spectacle Magnification and the Corrected | 49 |
Astigmatism | 56 |
Retinoscopy | 71 |
Visual Acuity and the Measurement | 88 |
Spectacle Magnification and Relative Spectacle | 203 |
Properties | 214 |
The Correction of Astigmatism with Rigid | 225 |
Silicone Hydrogel Contact Lenses | 241 |
Contact Lens Hydration Factors | 253 |
Chapter 2525 The Correction of Presbyopia with | 260 |
Practice | 282 |
Contact Lens | 293 |
Common terms and phrases
accommodation acuity addition ametropia angle assumed astigmatism axial length axis back surface binocular blur calculate caused centre Chapter chart clinical contact lens convergence corneal correction crystalline lens curvature cylinder determined disc effect equal equation equivalent Example factor Figure find first focal focus formed frame front surface given gives horizontal hypermetropia important increased lens system lenses less letter light magnification material measured meridian method metres minus moved movement myopia object ocular refraction optical patient placed position practice practitioner principal problem produce pupil radius ray-trace reading reduced surface referred reflex refractive index result retinal image retinoscopy soft spectacle spectacle lens sphere spherical standard subjective surface power Table tear lens technique thick tion toric trial uncorrected usually vergence vertex distance vertical vision visual